WO2019225687A1 - Terminal utilisateur - Google Patents

Terminal utilisateur Download PDF

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Publication number
WO2019225687A1
WO2019225687A1 PCT/JP2019/020404 JP2019020404W WO2019225687A1 WO 2019225687 A1 WO2019225687 A1 WO 2019225687A1 JP 2019020404 W JP2019020404 W JP 2019020404W WO 2019225687 A1 WO2019225687 A1 WO 2019225687A1
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WO
WIPO (PCT)
Prior art keywords
transmission
signal
user terminal
unit
frequency
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PCT/JP2019/020404
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English (en)
Japanese (ja)
Inventor
大輔 村山
浩樹 原田
和晃 武田
聡 永田
Original Assignee
株式会社Ｎｔｔドコモ
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Publication of WO2019225687A1 publication Critical patent/WO2019225687A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a user terminal in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • Non-patent Document 1 LTE-A (LTE-Advanced), FRA (Future Radio Access), 4G, 5G, 5G + (plus), NR ( New RAT), 3GPP (3 rd Generation Partnership Project) Rel.14,15,16 ⁇ also called, etc.) have also been studied.
  • the frequency band (licensed band, licensed carrier, licensed component carrier (CC) etc.) licensed by the operator (operator)
  • the specification has been performed on the assumption that exclusive operation will be performed.
  • 800 MHz, 1.7 GHz, 2 GHz, or the like is used as the license CC.
  • a frequency band (unlicensed band, unlicensed carrier, unlicensed CC) different from the above-mentioned license band. (Also called) is supported.
  • the unlicensed band for example, a 2.4 GHz band or a 5 GHz band that can use Wi-Fi (registered trademark) or Bluetooth (registered trademark) is assumed.
  • a carrier aggregation (CA) that integrates a carrier (CC) of a license band and a carrier (CC) of an unlicensed band is supported. Communication performed using the unlicensed band together with the license band is referred to as LAA (License-Assisted Access).
  • LAA is being used in future wireless communication systems (for example, 5G, 5G +, NR, Rel. 15 and later).
  • license connectivity and unlicensed band dual connectivity DC: Dual Connectivity
  • SA unlicensed band stand-alone
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the unlicensed carrier is a band shared by a plurality of carriers
  • transmission of other devices for example, wireless base stations, user terminals, Wi-Fi (registered trademark) devices, etc.
  • Listening to confirm presence / absence is performed. Listening is also called LBT: Listen Before Talk, CCA: Clear Channel Assessment, Carrier Sense or Channel Access Operation: channel access procedure, etc.
  • the present invention has been made in view of this point, and an object of the present invention is to provide a user terminal capable of appropriately performing interlaced transmission when the total usable bandwidth is variable. .
  • a user terminal uses an interlace composed of a plurality of frequency resources arranged at predetermined frequency intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission.
  • a transmission unit that transmits a signal; and a control unit that controls the predetermined frequency interval in which the plurality of frequency resources constituting the interlace are arranged.
  • interlaced transmission when the total available bandwidth is variable, interlaced transmission can be performed appropriately.
  • the license carrier is a carrier having a frequency allocated exclusively to one operator.
  • An unlicensed carrier is a carrier having a frequency shared by a plurality of business operators and RATs.
  • a license carrier is also called a component carrier (CC: Component Carrier), a cell, a primary cell (PCell: Primary Cell), a secondary cell (SCell: Secondary Cell), a primary secondary cell (PSCell: Primary Secondary Cell), or the like.
  • the unlicensed carrier is also called NR-U (NR-Unlicensed), CC, unlicensed CC, cell, LAA SCell (License-Assisted Access SCell) or the like.
  • LAA Licensed Assisted Access
  • LAA Licensed Assisted Access
  • CA carrier aggregation
  • SA stand-alone
  • a transmission point for example, a radio base station (gNB, eNB), a user terminal (UE), or the like
  • gNB radio base station
  • UE user terminal
  • the transmission point performs listening (LBT) at a timing before a predetermined period before the transmission timing.
  • the transmission point for executing LBT is the timing of a predetermined period before the transmission timing (for example, the immediately preceding subframe), and the entire target carrier band (for example, one component carrier (CC)) )
  • the entire target carrier band for example, one component carrier (CC)
  • CC component carrier
  • listening means that a certain transmission point (for example, a radio base station, a user terminal, etc.) exceeds a predetermined level (for example, predetermined power) from another transmission point before transmitting a signal.
  • a predetermined level for example, predetermined power
  • the listening performed by the transmission point is also called LBT (Listen Before Talk), CCA (Clear Channel Assessment), carrier sense or channel access procedure.
  • an access method with collision control also referred to as Receiver assisted access or Receiver assisted LBT may be applied.
  • the transmission point When the transmission point confirms that no other device is communicating, it transmits using the carrier. For example, when the reception power measured by listening is equal to or less than a predetermined threshold, the transmission point determines that the channel is in a free state and performs transmission.
  • the channel is in a free state means that the channel is not occupied by a specific system, and the channel is idle, the channel is clear, the channel is free, and the like.
  • the transmission point when the transmission point detects that another device is in use even in a part of the target carrier band, the transmission point stops its transmission process. For example, when the transmission point detects that the received power of a signal from another device related to the band exceeds a predetermined threshold, the transmission point determines that the channel is busy and does not perform transmission. In the busy state, the channel can be used only after listening again and confirming that it is in the free state. Note that the channel free state / busy state determination method using the LBT is not limited to this.
  • interference between LAA and Wi-Fi, interference between LAA systems, etc. can be avoided. be able to. Further, even when transmission points are controlled independently for each operator who operates the LAA system, interference can be reduced without grasping each control content by the LBT.
  • RA random access
  • the distance between a radio base station that forms an unlicensed carrier cell (also referred to as LAA SCell) and the UE is different from the distance between the radio base station that forms a licensed carrier primary cell (PCell: Primary Cell) and the UE.
  • the transmission timing for SCell is assumed to be different from the transmission timing for PCell.
  • Random access is performed at the time of initial connection, synchronization establishment, communication restart, etc., and can be divided into two types: collision type random access (CBRA) and non-collision type random access (Non-CBRA). it can.
  • the non-collision type random access may be referred to as contention-free RA (CFRA: Contention-Free Random Access).
  • a user terminal transmits a preamble randomly selected from a plurality of random access preambles (contention preambles) prepared in a cell using a physical random access channel (PRACH).
  • contention preambles random access preambles
  • PRACH physical random access channel
  • a user terminal transmits a UE-specific random access preamble (dedicated preamble) allocated from the network in advance by PRACH. In this case, since different random access preambles are allocated between user terminals, no collision occurs.
  • UE-specific random access preamble dedicated preamble
  • Collision type random access may be performed at the time of initial connection, uplink communication start or restart, for example.
  • Non-collision type random access may be performed, for example, at the time of handover, downlink communication start or restart, and the like.
  • LAA SCell non-collision type random access is assumed, but collision type random access may be performed.
  • PRACH preamble formats PRACH preamble formats
  • the RA (Random Access) preamble using each PRACH format includes a RACH OFDM symbol.
  • the RA preamble may include at least one of a cyclic prefix (CP) and a guard period (GP).
  • CP cyclic prefix
  • GP guard period
  • the PRACH formats 0 to 3 shown in FIG. 1 use a long sequence preamble sequence in the RACH OFDM symbol.
  • the PRACH formats A1 to A3, B1 to B4, C0, and C2 shown in FIG. 2 use a short sequence preamble sequence in the RACH OFDM symbol.
  • the frequency of the unlicensed carrier may be within the frequency range of either FR (Frequency Range) 1 or FR2.
  • FR1 may be a frequency range lower than the predetermined frequency
  • FR2 may be a frequency range higher than the predetermined frequency.
  • the predetermined frequency may be 7 GHz.
  • FR1 may be a 5 GHz band or a 6 GHz band.
  • FR2 may be a 60 GHz band.
  • the preamble sequence may be a Zadoff-Chu (ZC) sequence.
  • the preamble sequence length may be 839 (long sequence) or 139.
  • the preamble sequence may be mapped to a frequency resource (for example, subcarrier) allocated to the PRACH.
  • the RA preamble may use one of a plurality of numerologies.
  • the subcarrier spacing (SCS) for the long sequence of NR FR1 may be either 1.25 or 5 kHz.
  • the SCS for the short sequence of NR FR1 may be either 15 or 30 kHz.
  • the SCS for the short sequence of NR FR2 may be either 60 or 120 kHz.
  • the SCS for LTE long sequences may be 1.25 kHz.
  • the SCS for LTE short sequences may be 7.5 kHz.
  • the use of 5 GHz as one of the unlicensed carriers the occupied channel bandwidth (including 99% of the signal power)
  • OCB Occupied Channel Bandwidth must be 80% or more of the available bandwidth (for example, system bandwidth).
  • PSD Power Spectral Density
  • the PRACH may not satisfy the OCB rules depending on the PRACH neurology.
  • other uplink signals for example, uplink control channel (PUCCH: Physical Uplink Control Channel), uplink shared channel (PUSCH)
  • PUCCH Physical Uplink Control Channel
  • PUSCH uplink shared channel
  • interlaced transmission refers to multi-cluster transmission in units of predetermined frequency resources (for example, one or more resource blocks (RB) or one or more subcarriers), block IFDMA (Block Interleaved Frequency Division Multiple Access), etc. May be called.
  • One interlace may be defined as a set of a plurality of frequency resources allocated at a predetermined frequency interval (for example, 10 RB interval).
  • one interlace may be defined as a resource set mapped using the same resource (RB or cluster) pattern for each predetermined range (for example, 10 RBs) in the frequency direction.
  • Each frequency resource distributed in the frequency direction included in one interlace may be referred to as a cluster.
  • One cluster may be composed of one or more consecutive RBs, subcarriers, resource block groups, and the like. Although it is assumed that frequency hopping within the cluster is not applied, the frequency hopping may be applied.
  • FIG. 4 is a diagram illustrating an example of interlaced transmission.
  • the total available bandwidth eg, system bandwidth
  • interlace #i has index values ⁇ i, i + 10, i + 20,..., I + 90 ⁇ . It is composed of 10 RBs (clusters).
  • interlaces # 0 to # 9 are provided.
  • one or more interlaces may be allocated as frequency resources for uplink signals.
  • variable bands such as 20 MHz, 40 MHz, and 80 MHz can be used depending on the availability.
  • 20 MHz is assumed, and it is not assumed that the entire usable bandwidth is variable.
  • the unlicensed carrier uses a band wider than 20 MHz (for example, 40 MHz, 80 MHz), even if interlaced transmission is performed at 20 MHz, a bandwidth that is 80% or more of the bandwidth that can be used by the OCB In other words, there is a possibility that the above-mentioned OCB restriction cannot be satisfied.
  • the present inventors control the predetermined frequency interval in which a plurality of frequency resources constituting the interlace are arranged, so that the entire usable bandwidth is variable (for example, a bandwidth wider than 20 MHz).
  • the idea was to satisfy the above OCB constraints even when the width was also available.
  • the user terminal is configured with a plurality of frequency resources arranged at predetermined intervals (frequency intervals) within a predetermined bandwidth in an unlicensed carrier (a carrier on which listening is performed before transmission).
  • the uplink signal is transmitted using the interlace. Further, the user terminal controls the predetermined interval in which the plurality of frequency resources configuring the interlace are arranged.
  • the uplink signal is, for example, a random access channel (also referred to as PRACH, random access preamble, RACH preamble, preamble, etc.), an uplink control channel (PUCCH: Physical Uplink Shared Channel), an uplink shared channel (for example, PUSCH: Physical Uplink Shared Channel) may be used.
  • a random access channel also referred to as PRACH, random access preamble, RACH preamble, preamble, etc.
  • PUCCH Physical Uplink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • Each of a plurality of frequency resources constituting an interlace may be composed of one or more continuous RBs.
  • the user terminal configures the total number (y_RB) of RBs constituting the predetermined bandwidth (y_BW), the total number of RBs (x_RB) constituting the plurality of frequency resources in the interlace, and each frequency resource in the interlace
  • the predetermined interval (x_INTRB) may be controlled based on at least one of the number of consecutive RBs (x_CONSIGRB).
  • the user terminal may determine an interval (x_INTRB) between frequency resources in the interlace using the following steps 1 to 4. Note that the order of steps 1 to 3 is not limited to this, and may be switched.
  • the user terminal has at least one of a predetermined bandwidth (y_BW [Hz]), a subcarrier interval (x_SCS [Hz]), and the number of resource elements (RE: Resource Element) per RB (N_RB). Based on the above, the total number (y_RB) of RBs constituting the predetermined bandwidth may be determined.
  • N_RB may be the number of REs in the frequency direction per RB, the number of subcarriers per RB, and the like.
  • the user terminal may determine the total number (y_RB) of RBs constituting the predetermined bandwidth using the following formula (1).
  • y_RB floor (y_BW / x_SCS / N_RB)
  • step 2 the user terminal determines a plurality of frequency resources in the interlace based on at least one of the total number of subcarriers (x_SC) and the number of REs per RB (N_RB) used for uplink signal transmission. You may determine the total number (x_RB) of RB to comprise.
  • the user terminal may determine the total number (x_RB) of RBs constituting a plurality of frequency resources in the interlace using the following equation (2).
  • x_RB ceil (x_SC / N_RB)
  • step 3 the user terminal performs interlaced based on at least one of the total number of RBs (x_RB) constituting a plurality of frequency resources in the interlace and the total number of RBs (y_RB) constituting the predetermined bandwidth.
  • the number of consecutive RBs constituting each frequency resource (x_CONSIGRB) may be determined.
  • the user terminal may determine the number of consecutive RBs (x_CONSIGRB) constituting each frequency resource in the interlace using the following equation (3).
  • x_CONSIGRB ceil (x_RB / (y_RB-x_RB))
  • step 4 the total number of RBs constituting the entire bandwidth to be used (y_RB) determined in step 1, the total number of RBs used in uplink signal transmission (x_RB) determined in step 2, and the above interlace
  • the number of RBs (x_INTRB) serving as an interval between the frequency resources in the interlace may be determined based on at least one of the number of consecutive RBs (x_CONSIGRB) constituting each frequency resource.
  • the user terminal may determine the number of RBs (x_INTRB) serving as an interval between the frequency resources in the interlace using the following equation (4).
  • x_INTRB floor (y_RB / ceil (x_RB / x_CONSIGRB))-x_CONSIGRB
  • FIG. 5 is a diagram illustrating an example of control of an interval between frequency resources in an interlace according to the first aspect.
  • the total number (x_RB) of RBs used for uplink signal transmission is 10 RBs
  • the number of consecutive RBs (x_CONSIGRB) constituting each frequency resource in the interlace is 1 RB
  • the predetermined bandwidth (y_BW [Hz]) expands to 20 ⁇ 10 6 Hz (20 MHz), 40 ⁇ 10 6 Hz (40 MHz), and 80 ⁇ 10 6 Hz (80 MHz)
  • the number of RBs (x_INTRB) serving as an interval between frequency resources of interlace # 0 may be increased.
  • the predetermined bandwidth in which interlaced transmission is performed may be configured with a predetermined ratio or more of the bandwidth that can be used by the unlicensed carrier.
  • the OCB including 99% of the power of the signal only needs to have a bandwidth of 80% or more of the entire bandwidth.
  • the predetermined bandwidth in which the interlaced transmission is performed does not have to be the entire bandwidth of the unlicensed carrier, and may be a bandwidth of a predetermined ratio (for example, 80%) or more.
  • FIG. 6 is a diagram illustrating an example of control of an interval between frequency resources in an interlace according to the first aspect.
  • the user terminal may satisfy the relationship of Expression (5) in terms of the total number of RBs (y_RB) constituting the predetermined bandwidth.
  • Expression (5) (X_CONSIGRB + x_INTRB) x ceil (x_RB / x_CONSIGRB) ⁇ y_RB
  • intervals between frequency resources in an interlace need not be equal, and some intervals in the interlace may be different from other intervals. For example, when a fraction is generated by the total number (y_RB) of RBs constituting a predetermined bandwidth, some (for example, last) intervals may be different from other intervals.
  • the interval between the frequency resources constituting the interlace is controlled according to the entire bandwidth to be used. Therefore, even when the total available bandwidth is variable depending on the free bandwidth of the unlicensed carrier, it is possible to appropriately perform the interlaced transmission of the uplink signal while satisfying the OCB constraint.
  • the unlicensed carrier has been described as an example.
  • the present invention may be applied to a license carrier.
  • the present invention may be applied to a carrier that requires listening before transmission (a carrier for which listening is set), or a carrier that does not require listening before transmission (a carrier for which listening is not set). ) May be applied.
  • the radio base station may notify the UE of configuration information (for example, subcarrier interval, number of subcarriers per RB, predetermined bandwidth, etc.) related to interlaced transmission.
  • Information includes RMSI (Remaining Minimum System Information), upper layer signaling (for example, RRC (Radio Resource Control) signaling, broadcast information (Master Information Block (MIB), System Information Block), etc.) ), MAC (Medium Access Control) signaling), physical layer signaling (for example, downlink control information (DCI)), other signals, or a combination thereof may be used.
  • RMSI Remaining Minimum System Information
  • upper layer signaling for example, RRC (Radio Resource Control) signaling, broadcast information (Master Information Block (MIB), System Information Block), etc.
  • MIB Master Information Block
  • MAC Medium Access Control
  • DCI downlink control information
  • the first aspect may be applied not only to the uplink signal but also to the downlink signal.
  • the first aspect may be applied to any operational form of LAA system such as dual connectivity (DC), carrier aggregation (CA), or stand-alone (SA) with a license carrier.
  • DC dual connectivity
  • CA carrier aggregation
  • SA stand-alone
  • an unlicensed carrier may be used for at least one cell.
  • wireless communication system Wireless communication system
  • communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present invention.
  • FIG. 7 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
  • carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
  • DC dual connectivity
  • the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced 4G (4th generation mobile communication system), 5G. (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced 4G (4th generation mobile communication system)
  • 5G. 5th generation mobile communication system
  • FRA Full Radio Access
  • New-RAT Radio Access Technology
  • the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. It is equipped with. Moreover, the user terminal 20 is arrange
  • the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously by CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
  • CC cells
  • Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
  • a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
  • the same carrier may be used.
  • the configuration of the frequency band used by each radio base station is not limited to this.
  • a wired connection for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, etc.
  • a wireless connection It can be set as the structure to do.
  • the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
  • the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
  • RNC radio network controller
  • MME mobility management entity
  • Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
  • the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
  • the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
  • the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
  • Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
  • orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
  • SC-FDMA single carrier-frequency division multiple access
  • OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
  • SC-FDMA is a single-carrier transmission scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
  • the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
  • downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Also, MIB (Master Information Block) is transmitted by PBCH.
  • PDSCH downlink shared channel
  • PBCH Physical Broadcast Channel
  • SIB System Information Block
  • MIB Master Information Block
  • Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
  • Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
  • the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
  • the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
  • HARQ Hybrid Automatic Repeat reQuest
  • EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
  • an uplink shared channel (PUSCH) shared by each user terminal 20
  • an uplink control channel (PUCCH: Physical Uplink Control Channel)
  • a random access channel (PRACH: Physical Random Access Channel)
  • User data, higher layer control information, etc. are transmitted by PUSCH.
  • downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, and the like are transmitted by PUCCH.
  • CQI Channel Quality Indicator
  • delivery confirmation information and the like are transmitted by PUCCH.
  • a random access preamble for establishing connection with a cell is transmitted by the PRACH.
  • a cell-specific reference signal CRS
  • CSI-RS channel state information reference signal
  • DMRS demodulation reference signal
  • PRS Positioning Reference Signal
  • a measurement reference signal SRS: Sounding Reference Signal
  • a demodulation reference signal DMRS
  • the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
  • FIG. 8 is a diagram illustrating an example of the overall configuration of a radio base station according to an embodiment of the present invention.
  • the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
  • the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
  • User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access
  • Retransmission control for example, HARQ transmission processing
  • scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
  • IFFT Inverse Fast Fourier Transform
  • precoding processing precoding processing, and other transmission processing
  • the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
  • the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
  • the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
  • the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device, which is described based on common recognition in the technical field according to the present invention.
  • the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
  • the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
  • the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
  • the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
  • the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
  • FFT fast Fourier transform
  • IDFT inverse discrete Fourier transform
  • Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
  • the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
  • the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
  • the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
  • CPRI Common Public Radio Interface
  • X2 interface May be.
  • the transmission / reception unit 103 may receive an uplink signal (for example, PRACH, PUCCH, PUSCH, etc.). Specifically, the transmission / reception section 103 uses an interlace composed of a plurality of frequency resources arranged at predetermined frequency intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission, and uses an uplink signal. May be received.
  • an uplink signal for example, PRACH, PUCCH, PUSCH, etc.
  • the transmission / reception section 103 uses an interlace composed of a plurality of frequency resources arranged at predetermined frequency intervals within a predetermined bandwidth in a carrier on which listening is performed before transmission, and uses an uplink signal. May be received.
  • the transmission / reception unit 103 may transmit a downlink signal. Specifically, the transmission / reception unit 103 uses the interlace formed of a plurality of frequency resources arranged at a predetermined frequency interval within a predetermined bandwidth in a carrier on which listening is performed before transmission, to transmit a downlink signal. May be sent.
  • FIG. 9 is a diagram illustrating an example of a functional configuration of the radio base station according to the embodiment of the present invention.
  • the functional block of the characteristic part in this embodiment is mainly shown, and the wireless base station 10 shall also have another functional block required for radio
  • the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. These configurations may be included in the radio base station 10, and a part or all of the configurations may not be included in the baseband signal processing unit 104.
  • the control unit (scheduler) 301 controls the entire radio base station 10.
  • the control part 301 can be comprised from the controller, the control circuit, or control apparatus demonstrated based on the common recognition in the technical field which concerns on this invention.
  • the control unit 301 controls, for example, signal generation by the transmission signal generation unit 302, signal allocation by the mapping unit 303, and the like.
  • the control unit 301 also controls signal reception processing by the reception signal processing unit 304, signal measurement by the measurement unit 305, and the like.
  • the control unit 301 controls scheduling (for example, resource allocation) of downlink signals (for example, PDSCH, PDCCH, synchronization signals, etc.) and uplink signals (for example, PUSCH, PUCCH, PRACH, etc.).
  • scheduling for example, resource allocation
  • downlink signals for example, PDSCH, PDCCH, synchronization signals, etc.
  • uplink signals for example, PUSCH, PUCCH, PRACH, etc.
  • the control unit 301 transmits a downlink signal on a carrier (for example, an unlicensed carrier) that performs listening before downlink transmission to the transmission signal generation unit 302 and the mapping unit 303. May be controlled.
  • a carrier for example, an unlicensed carrier
  • control unit 301 may control at least one of generation and transmission of setting information related to interlaced transmission.
  • the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
  • the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 302 generates, for example, a DL assignment that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information based on an instruction from the control unit 301.
  • the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
  • CSI Channel State Information
  • the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
  • the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
  • the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
  • the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301.
  • the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.
  • the measurement unit 305 performs measurement on the received signal.
  • the measurement part 305 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
  • the measurement unit 305 Based on an instruction from the control unit 301, the measurement unit 305 performs LBT on a carrier on which LBT is set (for example, an unlicensed carrier), and the LBT result (for example, whether the channel state is free or busy). May be output to the control unit 301.
  • a carrier on which LBT is set for example, an unlicensed carrier
  • the LBT result for example, whether the channel state is free or busy
  • the measurement unit 305 for example, received power of a received signal (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)), uplink You may measure about propagation path information (for example, CSI) etc.
  • RSRP Reference Signal Received Power
  • reception quality for example, RSRQ (Reference Signal Received Quality)
  • SINR Signal to Interference plus Noise Ratio
  • uplink You may measure about propagation path information (for example, CSI) etc.
  • the measurement result may be output to the control unit 301.
  • FIG. 10 is a diagram illustrating an example of an overall configuration of a user terminal according to an embodiment of the present invention.
  • the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
  • the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
  • the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
  • the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
  • the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
  • the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
  • the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
  • the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
  • the downlink user data is transferred to the application unit 205.
  • the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information of downlink data may be transferred to the application unit 205.
  • uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
  • the baseband signal processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
  • the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
  • the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
  • the transmission / reception unit 203 may transmit an uplink signal (for example, PRACH, PUCCH, PUSCH, etc.). Specifically, the transmission / reception unit 203 uses an interlace composed of a plurality of frequency resources arranged at a predetermined frequency interval within a predetermined bandwidth in a carrier on which listening is performed before transmission, and uses an uplink signal. May be sent.
  • an uplink signal for example, PRACH, PUCCH, PUSCH, etc.
  • the transmission / reception unit 203 may receive a downlink signal. Specifically, the transmission / reception unit 203 uses the interlace composed of a plurality of frequency resources arranged at a predetermined frequency interval within a predetermined bandwidth in a carrier on which listening is performed before transmission, to transmit a downlink signal. May be received.
  • FIG. 11 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment of the present invention.
  • the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 also has other functional blocks necessary for wireless communication.
  • the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
  • the control unit 401 controls the entire user terminal 20.
  • the control unit 401 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
  • the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402, signal allocation by the mapping unit 403, and the like.
  • the control unit 401 also controls signal reception processing by the reception signal processing unit 404, signal measurement by the measurement unit 405, and the like.
  • the control unit 401 controls reception of DCI. Specifically, the control unit 401 monitors the search space (blind decoding) and detects DCI. The control unit 401 may control PDSCH reception based on the DCI. Moreover, the control part 401 may control transmission of PUSCH based on DCI.
  • control unit 401 based on the LBT result obtained by the measurement unit 405, transmits to the transmission signal generation unit 402 and the mapping unit 403 an uplink signal in a carrier (for example, an unlicensed carrier) that performs listening before uplink transmission. May be controlled.
  • a carrier for example, an unlicensed carrier
  • control unit 401 uses an interlace composed of a plurality of frequency resources arranged at predetermined intervals (frequency intervals) within a predetermined bandwidth in a carrier on which listening is performed before transmission. May be controlled.
  • the control unit 401 may control the predetermined interval in which the plurality of frequency resources constituting the interlace are arranged.
  • Each of the plurality of frequency resources constituting the interlace may be composed of one or more continuous resource blocks.
  • the control unit 401 determines the predetermined bandwidth based on at least one of the total number of resource blocks that configure the predetermined bandwidth, the total number of resource blocks that configure the plurality of frequency resources, and the number of consecutive resource blocks.
  • the interval may be controlled.
  • the control unit 401 may determine the total number of resource blocks constituting the predetermined bandwidth based on at least one of the predetermined bandwidth, the subcarrier interval, and the number of resource elements per resource block. Good.
  • the control unit 401 determines the total number of resource blocks constituting the plurality of frequency resources based on at least one of the total number of subcarriers used for transmission of the uplink signal and the number of resource elements per resource block. It is characterized by doing.
  • the control unit 401 determines each frequency resource in the interlace based on at least one of a total number of resource blocks constituting a plurality of frequency resources in the interlace and a total number of resource blocks constituting the predetermined bandwidth. You may determine the number of the continuous resource blocks to comprise.
  • the predetermined bandwidth may be a predetermined ratio (for example, 80%) or more of the bandwidth that can be used by the unlicensed carrier.
  • control unit 401 may update parameters used for control based on the information.
  • the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
  • the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
  • the transmission signal generation unit 402 generates an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
  • CSI channel state information
  • the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
  • the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
  • the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
  • the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
  • the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
  • the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
  • the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
  • the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
  • the measurement unit 405 performs measurement on the received signal.
  • the measurement unit 405 performs measurement using the downlink reference signal transmitted from the radio base station 10.
  • the measurement part 405 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
  • the measurement unit 405 performs LBT on a carrier on which LBT is set based on an instruction from the control unit 401.
  • the measurement unit 405 may output an LBT result (for example, a determination result of whether the channel state is free or busy) to the control unit 401.
  • the measurement unit 405 may measure, for example, received power (for example, RSRP), received quality (for example, RSRQ, received SINR), downlink channel information (for example, CSI), and the like of the received signal.
  • the measurement result may be output to the control unit 401.
  • each functional block is realized using one device physically or logically coupled, or two or more devices physically or logically separated may be directly or indirectly (for example, (Using wired, wireless, etc.) and may be implemented using these multiple devices.
  • a wireless base station, a user terminal, and the like may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 12 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment.
  • the wireless base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to perform calculations by reading predetermined software (programs) on hardware such as the processor 1001 and the memory 1002, for example, via the communication device 1004. This is realized by controlling communication or controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module, data, and the like from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program code
  • the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, and may be realized similarly for other functional blocks.
  • the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured by one.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to perform the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, and the like in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be constituted by.
  • the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • the devices such as the processor 1001 and the memory 1002 are connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using a different bus for each device.
  • the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • PLD Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • the terms described in the present disclosure and the terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meaning.
  • the signal may be a message.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
  • a component carrier CC: Component Carrier
  • CC Component Carrier
  • the radio frame may be configured by one or a plurality of periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
  • a subframe may be composed of one or more slots in the time domain.
  • the subframe may have a fixed length of time (eg, 1 ms) that does not depend on numerology.
  • the neurology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • SCS SubCarrier Spacing
  • bandwidth For example, subcarrier spacing (SCS: SubCarrier Spacing), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI: Transmission Time Interval), number of symbols per TTI, radio frame configuration, transceiver in frequency domain
  • TTI Transmission Time Interval
  • number of symbols per TTI radio frame configuration
  • transceiver in frequency domain It may indicate at least one of a specific filtering process to be performed and a specific windowing process to be performed by the transceiver in the time domain.
  • a slot may be configured with one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. Further, the slot may be a time unit based on the numerology.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may be configured with one or more symbols in the time domain. The minislot may also be called a subslot. A mini-slot may be composed of fewer symbols than slots.
  • PDSCH (or PUSCH) transmitted in units of time larger than a minislot may be referred to as PDSCH (PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using a minislot may be referred to as a PDSCH (PUSCH) mapping type B.
  • Radio frame, subframe, slot, minislot, and symbol all represent time units when transmitting signals. Different names may be used for the radio frame, subframe, slot, minislot, and symbol.
  • one subframe may be called a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI slot or one minislot
  • at least one of the subframe and the TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (for example, 1-13 symbols), or a period longer than 1 ms. It may be.
  • a unit representing TTI may be called a slot, a minislot, or the like instead of a subframe.
  • TTI means, for example, a minimum time unit for scheduling in wireless communication.
  • a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • a time interval for example, the number of symbols
  • a transport block, a code block, a code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling unit. Further, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • a TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • a long TTI (eg, normal TTI, subframe, etc.) may be read as a TTI having a time length exceeding 1 ms, and a short TTI (eg, shortened TTI) is less than the TTI length of the long TTI and 1 ms. It may be replaced with a TTI having the above TTI length.
  • a resource block (RB) is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain.
  • the RB may include one or a plurality of symbols in the time domain, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • One TTI and one subframe may each be composed of one or a plurality of resource blocks.
  • One or more RBs include physical resource blocks (PRB), sub-carrier groups (SCG), resource element groups (REG), PRB pairs, RB pairs, etc. May be called.
  • PRB physical resource blocks
  • SCG sub-carrier groups
  • REG resource element groups
  • PRB pairs RB pairs, etc. May be called.
  • the resource block may be configured by one or a plurality of resource elements (RE: Resource Element).
  • RE Resource Element
  • 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • the structure of the above-described radio frame, subframe, slot, minislot, symbol, etc. is merely an example.
  • the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in the slot, the number of symbols and RBs included in the slot or minislot, and the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and the like can be variously changed.
  • information, parameters, and the like described in the present disclosure may be expressed using absolute values, may be expressed using relative values from predetermined values, or may be expressed using other corresponding information. May be represented.
  • the radio resource may be indicated by a predetermined index.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • information, signals, and the like can be output from the upper layer to at least one of the lower layer and the lower layer to the upper layer.
  • Information, signals, and the like may be input / output via a plurality of network nodes.
  • the input / output information, signals, etc. may be stored in a specific location (for example, a memory) or may be managed using a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
  • information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
  • DCI downlink control information
  • UCI uplink control information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
  • the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
  • the MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).
  • notification of predetermined information is not limited to explicit notification, but implicitly (for example, by not performing notification of the predetermined information or other information) May be performed).
  • the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
  • the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
  • software, instructions, information, etc. may be transmitted / received via a transmission medium.
  • the software uses websites using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) When transmitted from a server or other remote source, at least one of these wired and wireless technologies is included within the definition of a transmission medium.
  • system and “network” as used in this disclosure may be used interchangeably.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • a base station may also be called terms such as a macro cell, a small cell, a femto cell, and a pico cell.
  • the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, an indoor small base station (RRH: Remote Radio Head)) can also provide communication services.
  • a base station subsystem eg, an indoor small base station (RRH: Remote Radio Head)
  • RRH Remote Radio Head
  • the terms “cell” or “sector” refer to part or all of the coverage area of at least one of a base station and a base station subsystem that provides communication services in this coverage.
  • MS mobile station
  • UE user equipment
  • Mobile station subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal , Handset, user agent, mobile client, client or some other suitable term.
  • At least one of the base station and the mobile station may be referred to as a transmission device, a reception device, or the like.
  • the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (for example, a car, an airplane, etc.), an unattended moving body (for example, a drone, an autonomous driving vehicle, etc.), or a robot (manned or unmanned).
  • at least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation.
  • the radio base station in the present disclosure may be replaced with a user terminal.
  • the communication between the radio base station and the user terminal is replaced with communication between a plurality of user terminals (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc. may be called))
  • a plurality of user terminals for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc. may be called)
  • the user terminal 20 may have a function that the wireless base station 10 has.
  • words such as “up” and “down” may be read as words corresponding to communication between terminals (for example, “side”).
  • an uplink channel, a downlink channel, etc. may be read as a side channel.
  • the user terminal in the present disclosure may be replaced with a radio base station.
  • the wireless base station 10 may have a function that the user terminal 20 has.
  • the operation performed by the base station may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may include a base station and one or more network nodes other than the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited thereto) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect / embodiment described in the present disclosure may be used alone, may be used in combination, or may be switched according to execution. Further, the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using an exemplary order and are not limited to the specific order presented.
  • Each aspect / embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced 4G (4th generation mobile communication). system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (Registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.
  • the present invention may be applied to a system using other appropriate wireless communication methods, a next-generation system extended based on these, and the like.
  • a plurality of systems may be combined and applied (for example, a combination of LTE or LTE-A and 5G).
  • the phrase“ based on ”does not mean“ based only on, ”unless expressly specified otherwise.
  • the phrase “based on” means both “based only on” and “based at least on.”
  • any reference to elements using designations such as “first”, “second”, etc. as used in this disclosure does not generally limit the amount or order of those elements. These designations can be used in this disclosure as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
  • determining may encompass a wide variety of actions. For example, “determination (decision)” includes determination, calculation, calculation, processing, derivation, investigating, looking up (eg, table, (Searching in a database or another data structure), ascertaining, etc. may be considered to be “determining”.
  • determination (decision) includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”.
  • determination is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
  • the “maximum transmission power” described in this disclosure may mean the maximum value of the transmission power, the nominal maximum transmission power (the nominal UE maximum transmit power), or the rated maximum transmission power (the rated UE maximum transmit power).
  • connection is any direct or indirect connection or coupling between two or more elements. And may include the presence of one or more intermediate elements between two elements “connected” or “coupled” to each other.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”.
  • radio frequency domain microwave It can be considered to be “connected” or “coupled” to each other using electromagnetic energy having a wavelength in the region, light (both visible and invisible) region, and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention réalise de manière appropriée une transmission entrelacée lorsqu'une bande passante utilisable entière est variable. Un terminal d'utilisateur selon un aspect de la présente invention est caractérisé en ce qu'il comprend : une unité de transmission pour transmettre un signal de liaison montante dans une porteuse dans laquelle une écoute est effectuée avant la transmission, le signal de liaison montante étant émis à l'aide d'un entrelacement constitué d'une pluralité de ressources de fréquence disposées à l'intérieur d'une bande passante prédéterminée à des intervalles de fréquence prédéterminés ; et une unité de commande pour commander les intervalles de fréquence prédéterminés auxquels la pluralité de ressources de fréquence constituant l'entrelacement sont disposées.
PCT/JP2019/020404 2018-05-24 2019-05-23 Terminal utilisateur WO2019225687A1 (fr)

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JP2018-111440 2018-05-24
JP2018111440 2018-05-24

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170273056A1 (en) * 2016-03-21 2017-09-21 Samsung Electronics Co., Ltd Scheduling uplink transmissions
JP2017530599A (ja) * 2014-08-15 2017-10-12 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ ワイヤレスネットワークにおける改善された通信効率のためのシステムおよび方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017530599A (ja) * 2014-08-15 2017-10-12 クゥアルコム・インコーポレイテッドＱｕａｌｃｏｍｍ Ｉｎｃｏｒｐｏｒａｔｅｄ ワイヤレスネットワークにおける改善された通信効率のためのシステムおよび方法
US20170273056A1 (en) * 2016-03-21 2017-09-21 Samsung Electronics Co., Ltd Scheduling uplink transmissions

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